When I re-x, I take what I have and I dissolve it in hot heptane (20-30ml/g). Then I let it cool down in the same beaker to room temperature, the heptane clears losing almost all the yellow and leaving it in the beaker. Then I pour it off to another beaker and put it in the freezer giving white result

Then I reuse less heptane for the rest and repeat few times, always using less heptane. Purity of the result is given by temperature of heptane when I pour it off the beaker.

Finally I have just the yellow residue. I let it dry slowly at room temperature, over few days, breaking it up by knife twice a day. The result is yellow powder, slightly waxy. Bud believe me, it is still very strong! I belive there is >90% of dmt. I don't think there is anything else in significant ammounts.

I am not smoking it, but people say the white one is much smoother for this ROA. Yellow is harsh.

I am a plugger (rectal ROA), so I am converting both fractions to fumarate and yellow fumarate is beautiful. White as well of course